正则匹配电话号码demo

public static String doFilterTelnum(String sParam) {
        String result = sParam;
        if (sParam.length() <= 0)
            return "";
        /*电话号码匹配规则"((13\\d{9})|(15[0,1,2,3,5,6,7,8,9]\\d{8})|(18[0,1,2,5,6,7,8,9]\\d{8})|(147\\d{8}))$*"*/
        Pattern pattern = Pattern.compile("(1|861)(3|5|7|8)\\d{9}$*");
        Matcher matcher = pattern.matcher(sParam);
        StringBuffer bf = new StringBuffer();
        while (matcher.find()) {
            bf.append(matcher.group()).append(",");
        }
        int len = bf.length();
        if (len > 0) {
            bf.deleteCharAt(len - 1);
        }
        String middle = bf.toString();
        String[] tels = middle.split(",");
        for (int i = 0; i < tels.length; i++) {
            result = result.replace(tels[i], "");
        }
        return result;
    }